Just bought a 'fully working' and almost mint black R4 body on eBay. The serial number is pre the acknowledged issues with that model although I'm told this would have almost certainly been sorted some time ago. Right now I can't afford a lens so it's waiting for me to save some pennies. I've put new batteries in it and it appears to work but obviously without a lens it's just a mechanical check. Visually the shutter seems to be pretty much the same on most speeds, it's almost as if there is a little delay between firing the shutter and the mirror flipping. This is my first Leica and I might be over reacting but it's worth asking you guys if there is a potential issue that might exist. The battery light is fine and everything works it just seems a bit sluggish. Any ideas or is this almost soft and subtle firing a Leica trait?